GST exemption on government-supplied services extends to mess accommodation; payment incentives treated as non-taxable subsidy. Accommodation services provided by Air Force messes and similar military or police messes to personnel or other non-business persons are exempt under Sl. No. 6 of notification No. 12/2017 when those services qualify as supplied by Central/State/UT or local authorities. Incentives paid by MeitY to acquiring banks under the RuPay/BHIM UPI promotion scheme are subsidies linked to the price of the payment service and are not consideration for services to the government; accordingly they do not form part of the taxable value and are not taxable under GST.